SINGAPORE (EDGEPROP) - Knight Frank’s Prime International Residential Index 100 (PIRI 100), which tracks and analyses prime price performance in 100 cities and second home markets worldwide, increased by 8.4% in 2021, up from 2% in 2020, according to the real estate consultancy’s annual The Wealth Report. This is the highest annual increase in the value of the index since it was launched in...